parish councils/towns county antrim? around 1873?

Question

name begins with either a L or S and ends with breck.

Answer 1

It's not clear from the question, archaeologia, whether it's the name of a council or town which ends in -breck, or whether you are looking for a proper name ending in -breck which might appear on a parish or other register. Maybe that's just my failure to read properly!
At any rate, there don't appear to be any towns or villages in County Antrim which match the description you give. Further, even registers of 'townlands' - a peculiarly Irish phenomenon - do not throw up any matches for your description. The only townlands in Antrim which even come close are 'Breckagh' and 'Aldfreck'.
Irish records are difficult to access because of the destruction of census records and other material relating to the latter end of the 19th century. Strictly 'British' records and data-gatherers tend to avoid Ireland for that reason.
Your best bet is the Public Records Office of Northern Ireland and, perhaps, the data gathered as part of the Placenames Project in Queen's University, Belfast. Take a look at the links below and best of luck with your search.

Answer 2

Hello have a look at the links posted below, the first one Irish look ups may be all you need to find it.
http://rmhh.co.uk/ireland.html
http://www.gazetteer.co.uk/
the gazetteer is excellent.

Answer 3

Attaches is a Wikipedia link that you might try:
http://en.wikipedia.org/wiki/Category:Villages_in_Antrim

I didn't see any villages or towns whose spellings fit your description.